[BUG] "error - substring not found"

[JadianRadiator]

OS: What operating system are you running Manga Tagger on?
Windows 10
Manga Tagger Version: What version of Manga Tagger are you running?
https://github.com/Inpacchi/Manga-Tagger/releases/tag/v1.1.5-alpha
Description of the issue: Give a a clear and concise description of what the issue is.
It keeps failing with an "error - substring not found" error in the logs,
but not graphical error notice.
Manga Series: What manga series (singular or plural) were being tagged when the issue was encountered?
Happens with everything, last one tried was "The Galactic Navy Officer Becomes An Adventurer"
Screenshots (If applicable): Add screenshots to help explain your problem.
No error popups
Log File: Please make sure JSON logging is enabled and upload the JSON log file
Had to rename it before uploading since .json isn't accepted for direct upload by GitHub
MangaTagger.json.txt
This is the log file I setup through NSSM
manga_tager.log
.