Strange Sync to Salesforce Errors causing MQLs to not Sync from Marketo

Anonymous
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Strange Sync to Salesforce Errors causing MQLs to not Sync from Marketo

Has anyone ever seen the below errors? They are causing MQLs to not sync over to SFDC. I noticed this and ran a query and found 95 others that didn't sync over and are just sitting in Marketo. I'm not sure if this is a Marketo issue or something happening in our SFDC instance that causes the sync to fail.

Here is the first error:

image (4).png

Here is a separate one from April:

image (5).png

Any thoughts or help would be much appreciated.