Invalid Argument Exception and Context Error Exception errors on Front Office

[Sngam]

Hey everyone!
I'm new to this forum. Prestashop is amazing but there are a few issues that I've faced while setting up my new store that are really frustrating!
Recently, I cleared my cache and started getting these two errors on my front office (Invalid Argument Exception and Context Error Exception).
I tried clearing my cache from my server but it was of no help. I also tried uninstalling a module that was a part of this error, but I started getting same kind of error for another module.
The website was working perfectly fine before clearing the cache.

And I don't know why but the error is not there when I switch back to PrestaShop's default theme.
I've searched on Google a lot about the issue, most of the users are having this issue after clearing the cache.
Please help!

[Tom Girou]

Do you have DEBUG_MODE enabled ? If yes, disable it.

Anyway it looks like you have a problem with your module ht_categoryslider. From the look of it, it could be a slide linked to a category that doesn't exist anymore.

[Sngam]

Hey Girou!
Thanks for your reply. The error was rectified by the theme provider. They told me that there was some error with the old theme.js file. I don't know what they did to it but now the issue is fixed.
There some different issue now. The back office's home page (dashboard) is showing a loading icon on the top left portion of screen. Maybe, the dashboard is not able to load a few things due to which I'm not able to upload even a module.