Accessible through https://customdomain.dev, but not through app.plex.tv

Server Version#:Version 1.43.0.10492
Player Version#:Version 4.156.0

I get this error: “app.plex.tv is unable to connect to “REDACTED” securely”, but I am still able to have it fully working when I view it through https://customdomain.dev

I’m not sure what I should do or what trouble-shooting steps I should take.

I’m getting these logs.

Feb 21, 2026 04:01:01.786 [134357080984376] Debug — Request: [[::1]:34972 (Loopback)] GET /web (5 live) #1137 TLS GZIP Signed-in
Feb 21, 2026 04:01:01.787 [134357246905144] Debug — Completed: [[::1]:34972] 302 GET /web (5 live) #1137 TLS GZIP 0ms 233 bytes (pipelined: 1) -> https://localhost:32400/web/index.html
Feb 21, 2026 04:01:01.787 [134357149170488] Debug — Request: [[::1]:34972 (Loopback)] GET /web/index.html (5 live) #114b TLS GZIP Signed-in
Feb 21, 2026 04:01:01.787 [134357149170488] Debug — [Req#114b] Final path: "/usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html"
Feb 21, 2026 04:01:01.788 [134357149170488] Debug — Content-Length of /usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html is 30190 (of total: 30190).
Feb 21, 2026 04:01:01.788 [134357249014584] Debug — Failed to stream media, client probably disconnected after 16384 bytes: 104 - Connection reset by peer
Feb 21, 2026 04:01:01.788 [134357249014584] Debug — Completed after connection close: [[::1]:34972] 200 GET /web/index.html (5 live) #114b TLS GZIP 1ms 16384 bytes (pipelined: 2)
Feb 21, 2026 04:01:06.790 [134357080984376] Debug — Request: [[::1]:44056 (Loopback)] GET /web (5 live) #1148 TLS GZIP Signed-in
Feb 21, 2026 04:01:06.790 [134357246905144] Debug — Completed: [[::1]:44056] 302 GET /web (5 live) #1148 TLS GZIP 0ms 233 bytes (pipelined: 1) -> https://localhost:32400/web/index.html
Feb 21, 2026 04:01:06.791 [134357149170488] Debug — Request: [[::1]:44056 (Loopback)] GET /web/index.html (5 live) #115b TLS GZIP Signed-in
Feb 21, 2026 04:01:06.791 [134357149170488] Debug — [Req#115b] Final path: "/usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html"
Feb 21, 2026 04:01:06.791 [134357149170488] Debug — Content-Length of /usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html is 30190 (of total: 30190).
Feb 21, 2026 04:01:06.791 [134357246905144] Debug — Failed to stream media, client probably disconnected after 16384 bytes: 32 - Broken pipe
Feb 21, 2026 04:01:06.791 [134357246905144] Debug — Completed after connection close: [[::1]:44056] 200 GET /web/index.html (5 live) #115b TLS GZIP 0ms 16384 bytes (pipelined: 2)
Feb 21, 2026 04:01:11.795 [134357080984376] Debug — Request: [[::1]:44060 (Loopback)] GET /web (5 live) #1159 TLS GZIP Signed-in
Feb 21, 2026 04:01:11.795 [134357246905144] Debug — Completed: [[::1]:44060] 302 GET /web (5 live) #1159 TLS GZIP 0ms 233 bytes (pipelined: 1) -> https://localhost:32400/web/index.html
Feb 21, 2026 04:01:11.795 [134357149170488] Debug — Request: [[::1]:44060 (Loopback)] GET /web/index.html (5 live) #116d TLS GZIP Signed-in
Feb 21, 2026 04:01:11.795 [134357149170488] Debug — [Req#116d] Final path: "/usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html"
Feb 21, 2026 04:01:11.795 [134357149170488] Debug — Content-Length of /usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html is 30190 (of total: 30190).
Feb 21, 2026 04:01:11.796 [134357249014584] Debug — Failed to stream media, client probably disconnected after 16384 bytes: 32 - Broken pipe
Feb 21, 2026 04:01:11.796 [134357249014584] Debug — Completed after connection close: [[::1]:44060] 200 GET /web/index.html (5 live) #116d TLS GZIP 0ms 16384 bytes (pipelined: 2)
Feb 21, 2026 04:01:16.805 [134357080984376] Debug — Request: [[::1]:43932 (Loopback)] GET /web (5 live) #116a TLS GZIP Signed-in
Feb 21, 2026 04:01:16.806 [134357249014584] Debug — Completed: [[::1]:43932] 302 GET /web (5 live) #116a TLS GZIP 0ms 233 bytes (pipelined: 1) -> https://localhost:32400/web/index.html
Feb 21, 2026 04:01:16.807 [134357149170488] Debug — Request: [[::1]:43932 (Loopback)] GET /web/index.html (5 live) #117e TLS GZIP Signed-in
Feb 21, 2026 04:01:16.807 [134357149170488] Debug — [Req#117e] Final path: "/usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html"
Feb 21, 2026 04:01:16.807 [134357149170488] Debug — Content-Length of /usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html is 30190 (of total: 30190).
Feb 21, 2026 04:01:16.808 [134357249014584] Debug — Failed to stream media, client probably disconnected after 16384 bytes: 32 - Broken pipe
Feb 21, 2026 04:01:16.808 [134357249014584] Debug — Completed after connection close: [[::1]:43932] 200 GET /web/index.html (5 live) #117e TLS GZIP 1ms 16384 bytes (pipelined: 2)
Feb 21, 2026 04:01:21.815 [134357080984376] Debug — Request: [[::1]:43942 (Loopback)] GET /web (5 live) #117b TLS GZIP Signed-in
Feb 21, 2026 04:01:21.816 [134357246905144] Debug — Completed: [[::1]:43942] 302 GET /web (5 live) #117b TLS GZIP 0ms 233 bytes (pipelined: 1) -> https://localhost:32400/web/index.html
Feb 21, 2026 04:01:21.817 [134357149170488] Debug — Request: [[::1]:43942 (Loopback)] GET /web/index.html (5 live) #118f TLS GZIP Signed-in
Feb 21, 2026 04:01:21.817 [134357149170488] Debug — [Req#118f] Final path: "/usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html"
Feb 21, 2026 04:01:21.817 [134357149170488] Debug — Content-Length of /usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html is 30190 (of total: 30190).
Feb 21, 2026 04:01:21.818 [134357249014584] Debug — Failed to stream media, client probably disconnected after 16384 bytes: 32 - Broken pipe
Feb 21, 2026 04:01:21.818 [134357249014584] Debug — Completed after connection close: [[::1]:43942] 200 GET /web/index.html (5 live) #118f TLS GZIP 1ms 16384 bytes (pipelined: 2)
Feb 21, 2026 04:01:26.820 [134357080984376] Debug — Request: [[::1]:42332 (Loopback)] GET /web (5 live) #118c TLS GZIP Signed-in
Feb 21, 2026 04:01:26.820 [134357249014584] Debug — Completed: [[::1]:42332] 302 GET /web (5 live) #118c TLS GZIP 0ms 233 bytes (pipelined: 1) -> https://localhost:32400/web/index.html
Feb 21, 2026 04:01:26.821 [134357149170488] Debug — Request: [[::1]:42332 (Loopback)] GET /web/index.html (5 live) #11a0 TLS GZIP Signed-in
Feb 21, 2026 04:01:26.821 [134357149170488] Debug — [Req#11a0] Final path: "/usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html"
Feb 21, 2026 04:01:26.821 [134357149170488] Debug — Content-Length of /usr/lib/plexmediaserver/Resources/Plug-ins-121068a07/WebClient.bundle/Contents/Resources/index.html is 30190 (of total: 30190).
Feb 21, 2026 04:01:26.821 [134357246905144] Debug — Completed: [[::1]:42332] 200 GET /web/index.html (5 live) #11a0 TLS GZIP 0ms 30190 bytes (pipelined: 2)