Cannot invoke "monero.wallet.MoneroWallet.getHeight()" because "this.wallet" is null + proto. timeout (Linux v1.0.17 .deb)

[slrslr]

v1.0.17 .deb on Linux Debian 12 with KDE

Warning
An error occurred when taking the offer. (takeOffer.error.message)

An error occurred at task: MaybeSendSignContractRequest
Exception message: Cannot invoke "monero.wallet.MoneroWallet.getHeight()" because "this.wallet" is null

(happened 2 times in a row, after confirming to take an offer to sell XMR for fiat. On third attempt there was different error - Pr0t0c0l did n0t c0mplete in 18O sec., state=C0NTRACT_SIGNATUR€_R€QU€ST€D, on 4th attempt it worked, but took like 4 minutes)
I have seen no other interesting warning/errors in logs around the time. If needed more logs, please publish maintainer contact at https://github.com/retoaccess1 or similar page for private log delivery.

What to do next once this issue happen again, please?