Internal JSON-RPC error

yesterday ive made an lp for farming.
i couldnt deposit it in my farm.
an error message from METAMASK:
An error occurred. Refresh the page and try again. If the issue still persists, it might be an issue with your RPC node settings in Metamask.

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Internal JSON-RPC error.

ive deleted the browser dns cache, history
ive changed to other browser, still same problem
your web app doesnt allow me to remove that liquidity…
ive asked in telegram, discord and medium, and nobody helps

this is my address 0x6FdC9cfB0715231ec74a4edf128E3ae9e9875D80

Have you been able to sort this issue ?