No errors, actually shows nothing regarding IMDB requests, just the logs of the plugin initialising a couple of days ago (I replicated the problem just prior to checking these logs).
2019-08-22 22:01:58,602 (7f2e86592700) : INFO (core:349) - Starting framework core - Version: 2.6.3, Build: 1e5ff71 (Wed Aug 21 06:45:59 UTC 2019)
2019-08-22 22:01:58,602 (7f2e86592700) : DEBUG (core:361) - Using the elevated policy
2019-08-22 22:01:58,602 (7f2e86592700) : DEBUG (core:450) - Starting runtime component.
2019-08-22 22:01:58,604 (7f2e86592700) : DEBUG (core:450) - Starting caching component.
2019-08-22 22:01:58,605 (7f2e86592700) : DEBUG (core:450) - Starting data component.
2019-08-22 22:01:58,605 (7f2e86592700) : DEBUG (core:450) - Starting networking component.
2019-08-22 22:01:58,605 (7f2e86592700) : DEBUG (networking:284) - Loaded HTTP cookies
2019-08-22 22:01:58,607 (7f2e86592700) : DEBUG (networking:452) - Setting the default network timeout to 20.0
2019-08-22 22:01:58,607 (7f2e86592700) : DEBUG (core:450) - Starting localization component.
2019-08-22 22:01:58,608 (7f2e86592700) : INFO (localization:409) - Setting the default locale to en-us
2019-08-22 22:01:58,608 (7f2e86592700) : DEBUG (core:450) - Starting messaging component.
2019-08-22 22:01:58,608 (7f2e86592700) : DEBUG (core:450) - Starting debugging component.
2019-08-22 22:01:58,609 (7f2e86592700) : DEBUG (core:450) - Starting services component.
2019-08-22 22:01:58,609 (7f2e667fc700) : DEBUG (networking:166) - Requesting 'http://127.0.0.1:32400/system/messaging/clear_events/com.plexapp.agents.imdb'
2019-08-22 22:01:58,609 (7f2e86592700) : DEBUG (core:450) - Starting myplex component.
2019-08-22 22:01:58,610 (7f2e86592700) : DEBUG (core:450) - Starting notifications component.
2019-08-22 22:01:58,851 (7f2e86592700) : DEBUG (accessor:68) - Creating a new model access point for provider com.plexapp.agents.imdb in namespace 'metadata'
2019-08-22 22:01:58,858 (7f2e86592700) : DEBUG (networking:166) - Requesting 'http://127.0.0.1:32400/:/plugins/com.plexapp.system/resourceHashes'
2019-08-22 22:01:58,881 (7f2e667fc700) : DEBUG (services:265) - Plug-in is not daemonized - loading services from system
2019-08-22 22:01:58,882 (7f2e86592700) : DEBUG (runtime:1117) - Created a thread named 'load_all_services'
2019-08-22 22:01:58,883 (7f2e667fc700) : DEBUG (networking:166) - Requesting 'http://127.0.0.1:32400/:/plugins/com.plexapp.system/messaging/function/X0J1bmRsZVNlcnZpY2U6QWxsU2VydmljZXM_/Y2VyZWFsMQoxCmxpc3QKMApyMAo_/Y2VyZWFsMQoxCmRpY3QKMApyMAo_'
2019-08-22 22:01:58,883 (7f2e86592700) : DEBUG (runtime:1117) - Created a thread named 'get_server_info'
2019-08-22 22:01:58,884 (7f2e6577a700) : DEBUG (networking:166) - Requesting 'http://127.0.0.1:32400'
2019-08-22 22:01:58,884 (7f2e86592700) : DEBUG (core:150) - Finished starting framework core
2019-08-22 22:01:58,885 (7f2e86592700) : DEBUG (core:560) - Loading plug-in code
2019-08-22 22:01:59,083 (7f2e6577a700) : DEBUG (core:538) - Machine identifier is 2d070e8d4c3698af5ea81dc68574860e7efa2fdf
2019-08-22 22:01:59,084 (7f2e6577a700) : DEBUG (core:539) - Server version is 1.16.5.1554-1e5ff713d
2019-08-22 22:01:59,656 (7f2e667fc700) : DEBUG (services:362) - Loaded services
2019-08-22 22:01:59,709 (7f2e65f7b700) : DEBUG (services:438) - No shared code to load
2019-08-22 22:01:59,898 (7f2e86592700) : DEBUG (core:566) - Finished loading plug-in code
2019-08-22 22:02:00,082 (7f2e86592700) : DEBUG (agentkit:1115) - Creating new agent class called PlexMovieAgent
2019-08-22 22:02:00,083 (7f2e86592700) : DEBUG (agentkit:933) - Updating agent information: [{'media_types': ['Movie'], 'accepts_from': ['com.plexapp.agents.localmedia'], 'fallback_agent': None, 'contributes_to': ['com.plexapp.agents.themoviedb'], 'languages': ['en', 'sv', 'fr', 'es', 'nl', 'de', 'it', 'da', 'ar', 'ca', 'zh', 'cs', 'et', 'fi', 'el', 'he', 'hi', 'hu', 'id', 'ja', 'ko', 'lv', 'no', 'fa', 'pl', 'pt', 'ro', 'ru', 'sk', 'th', 'tr', 'uk', 'vi'], 'persist_stored_files': True, 'version': 0, 'primary_provider': True, 'prefs': True, 'name': 'Plex Movie'}]
2019-08-22 22:02:00,084 (7f2e86592700) : DEBUG (networking:166) - Requesting 'http://127.0.0.1:32400/:/plugins/com.plexapp.system/messaging/function/X0FnZW50U2VydmljZTpVcGRhdGVJbmZv/Y2VyZWFsMQoxCmxpc3QKMApyMAo_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_'
2019-08-22 22:02:00,099 (7f2e86592700) : INFO (core:611) - Started plug-in
2019-08-22 22:02:00,100 (7f2e86592700) : DEBUG (socketinterface:160) - Starting socket server
2019-08-22 22:02:00,101 (7f2e86592700) : DEBUG (runtime:1117) - Created a thread named 'start'
2019-08-22 22:02:00,101 (7f2e86592700) : INFO (socketinterface:184) - Socket server started on port 41653
2019-08-22 22:02:00,102 (7f2e86592700) : INFO (pipeinterface:25) - Entering run loop
2019-08-22 22:02:00,102 (7f2e86592700) : DEBUG (runtime:717) - Handling request GET /:/prefixes
2019-08-22 22:02:00,105 (7f2e86592700) : DEBUG (runtime:814) - Found route matching /:/prefixes
2019-08-22 22:02:00,106 (7f2e86592700) : DEBUG (runtime:924) - Response: [200] MediaContainer, 148 bytes
2019-08-22 22:02:00,108 (7f2e667fc700) : DEBUG (runtime:717) - Handling request GET /:/plugins/com.plexapp.agents.imdb/prefs
2019-08-22 22:02:00,126 (7f2e667fc700) : DEBUG (runtime:814) - Found route matching /:/plugins/com.plexapp.agents.imdb/prefs
2019-08-22 22:02:00,127 (7f2e667fc700) : DEBUG (preferences:258) - Loaded preferences from DefaultPrefs.json
2019-08-22 22:02:00,128 (7f2e667fc700) : DEBUG (preferences:178) - Loaded the user preferences for com.plexapp.agents.imdb
2019-08-22 22:02:00,133 (7f2e667fc700) : DEBUG (runtime:88) - Sending packed state data (104 bytes)
2019-08-22 22:02:00,133 (7f2e667fc700) : DEBUG (runtime:924) - Response: [200] MediaContainer, 2223 bytes