My website runs with Elgg v3.3.24 and for a while there were no troubles. but now I started to notice that some pictures aren't showing up and if I post them again (embeded), then all the comments will be gone.
At this point I don't know which plugin is broken or what really happened.
These are the links samples:
Group-Rules

/serve-file/e0/l1613366964/di/c1/zNoOqctJTqEetpfgZ7zJUdCUEU3dfG7U7WEuSqMEK3g/1/49/file/largethumb1613366962group_rules.jpg 

/serve-file/e0/l1647634817/di/c1/5x2UpB9NNHielocjgUb30G826tDvwbxT1HVESq760C4/:OTUwMDAvOTU2MTAvZmlsZS90aHVtYjE2NDc2MzQ4MTZjdXRlLXB1cC5qcGc

/file/view/40643/group-rules#comments
I would like to fix these issues.
The page shows: HMAC mismatch Thank You.