I deleted my review because I was wrong : this plugin is awesome. Not only it has a lot of interesting effect contrary to what I said (I was a bit quick on my judgment), but I also managed to do EXACTLY what I wanted : a CRT-like effect for retro-gaming.
With a combination of crt-curvature, chromatic-aberration, and scan_line, the result is mesmerizing. I mean, I have teste ShaderGlass and crt-hyllian-curvature, or crt-matthias, or newpixie-crt (the best), but this is far BETTER than everything expected. What I have manage with Exeldro's plugin is way more impressive.
You diserve my apologies. I've always thought you're the best plugin provider for OBS, but now this is certain.
If it has stopped working, and changing to a lower scaling factor does not cause it to start working again, then you may have triggered a more significant error that I am (purposefully) not trying to recover from. Removing the filter and re-adding it should activate it again if it was working in the first place, or restarting OBS can also fix this.
If your input source is in the correct resolution range, and removing/re-adding the filter, or restarting OBS does not fix this problem, your OBS log should have relevant error messages from the plugin.