Nuno Posted November 29, 2022 Share Posted November 29, 2022 Dear Line 6 friends: i am trying to REGISTER my new HELIX LT, but it shows the following: There was an error processing your submission. (Error: ESN could not be verified. Please confirm the supplied USN. ( Error: 523) ) May we have a solution?? Thanks in advance 1 Quote Link to comment Share on other sites More sharing options...
gryfnymarcin Posted January 10, 2023 Share Posted January 10, 2023 I have the same problem, I tried to enter SN in multiple different ways Quote Link to comment Share on other sites More sharing options...
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