XF 2.1 What does this error mean?

[ssj2_ssbm]

In the ACP I have several error log entries that look like this

• ErrorException: Fatal Error: Out of memory (allocated 2097152) (tried to allocate 401408 bytes)
• src/XF/Db/Mysqli/Statement.php:125
• Generated by: Unknown account

What could be the culprit? Yesterday we tried uploading large animated avatars multiple times could that be what’s responsible for this error?
And how can I fix this?

 

[Kirby]

You might want to take a look here:

XF 2.1 - ErrorException: Fatal Error: Out of memory (allocated 35651584) (tried to allocate 4096 bytes)

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