hey
so i found on an old hard drive of mine an old electrum wallet backup plus written down all the addresses and private keys. opened it with electrum and everything seemed fine at first but when i tried to move some of the funds i got an error saying "The server returned an error when broadcasting the transaction. Consider trying to connect to a different server, or updating Electrum." Script failed an OP_EQUALVERIFY operation" so i went over to block explorer to broadcast raw and there i get an error " sendrawtransaction RPC error -26: mandatory-script-verify-flag-failed (Script failed an OP_EQUALVERIFY operation)".i tried 3 different transactions always the same. But whats weird if i look now in "sent" on electrum two of them are listed unpaid but one is suddenly listed as unconfirmed.so i tried to use the seed on a different wallet but there i get "invalid seed" and when i tried the private keys, for some of them i get a different address every time. meaning i import a private key into my wallet check address, then delete that wallet again and import the same key again, i suddenly get a different address then the time before.
so yeah if anyone could point me into the right direction  as to where to even start to try and fix this clusterfuck, would be greatly appreciated