DCIM / .thumbnails files missing issue

[MRDEVIL110]

I'm using Samsung M30, the .thumbnails files were deleted from my DCIM folder. Most probably by using Ccleaner to clear up space.
Now the issue is, I can not see the correct thumbnails of the photos when I try to upload/Send them through Instagram or Whatsapp.
The thumbnail shows a different image, but actually it is a different image when selected.

.thumbnails folder is empty and no new thumbnail file is being generated.

Things I have done so far:

1. Cleared Gallery Cache.
2. Cleared the Cache Partition.
3. Cleared Cache and Data of "Media Storage"
4. Soft Reset my Device
5. Deleted the .thumbnails folder and created a new one again.

None of the above methods has helped.
Please help for the same.

[Samsung_Support3]

Dear Samsung Member,

Greetings from Samsung Customer Support!

Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support

[MRDEVIL110]

I can't find it on Playstore India. Can I get the link?