And if you check Settings > Remote access, your server status is “fully accessible”?
SRT files are small external text files with subtitles. In the last week or so, all of a sudden having an external subtitle enabled causes issues, thread here. Disabling the subtitle resolves it. No idea what is going on.
AMD CPU will work to stream. The compatibility issue with it arises only if you want to enable additional “hardware acceleration”, to employ help from your graphics. So if you have multiple streams transcoding in real-time, and CPU is struggling, with Intel you can enable “hardware acceleration” and onboard graphics of the chip will start helping with the transcoding. This will not work for AMD. You will need an dedicated Nvidia card to get this. So pretty much to have this option you need either 1) Intel CPU or 2) Nvidia GPU.
It’s not necessary for basic streaming though, as CPU can transcode concurrently, without acceleration help. That’s why in a post above I was surpirsed you have an i7 and getting errors it’s not enough to stream a 720p file… Your existing hardware should be more than sufficient.