The Message Integrity Code (MIC) does not match the sent AS2 message (required: D1l7ktpEpRMq18zd3WT+f4PNWLkvaTboUxG7MTchkps=, sha256, returned: D1l7ktpEpRMq18zd3WT+f4PNWLkvaTboUxG7MTchkps=,sha256)"
it was only a space between the MIC, i suggest to add trim()
The Message Integrity Code (MIC) does not match the sent AS2 message (required: D1l7ktpEpRMq18zd3WT+f4PNWLkvaTboUxG7MTchkps=, sha256, returned: D1l7ktpEpRMq18zd3WT+f4PNWLkvaTboUxG7MTchkps=,sha256)"
it was only a space between the MIC, i suggest to add trim()