If you can't claim from website, you can claim from here :
Use TokenPocket
https://arbiscan.io/address/0x67a24ce4321ab3af51c2d0a4801c3e111d88c9d9#writeContract
If you got RPC error, keep trying 1-3 times until you see "View your transaction" (I tried and it's working)
After you claimed, add contract address on trust wallet or tokenpocket : 0x912CE59144191C1204E64559FE8253a0e49E6548 (to see your ARB)
You must deposit quickly your ARB to exchange so your ARB will be safe