REST API Submission Error: Payload String too Long

Hi All,

Thank you in advance to give me some time to read my problem and providing me elegant solutions.

My problem is: When I am trying to send my Submission in ODK Central REST Submission API then it is giving me 500 Internal Server Error. In server I use docker compose log service and I got error: payload string too long. When I am sending relatively small form then it is fine and working nicely.

My server has 4GB RAM and 40GB Disk Space. I have 20GB free space and only 1GB Ram is used.

Please help me to resolve my Issue so that I can send big forms. Please its an urgent matter to me. Please help.