Failed to deserialize JSON to REST_Error

After upgrading two Outsystems plataforms (dev and production environments) to version 10.0.302.0 from version 9, lifetime stopped syncing changes to the servers. The error log shows this message: "Failed to deserialize JSON to REST_Error: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.

Does anyone have a clue on where to look for?

Thanks in advance,

Márcio Lima.


Hello Márcio,

can you please get in contact with our support?



Yep, that's what I thought. 


Hello guys! 

What's the solution for this case? 

I'm having the same problem!


Hi Thiago,

The support team solved it for me, so I don't know what it was.

I guess you should contact them as well. :)

I'm contact the support and waiting for answer. 

I think that the resolution maybe help others to through this problem.

Thanks to fast reply!

any update on this? how did you solve it