Hi,
I have been used the function ‘Optical -> Rayleigh Correction’ with default values, than an error got form the process:
Type: Operator Exception
Message: Can’t find the closest max value of NaN
The file is S2B_MSIL1C_20200620T160829_N0209_R140_T16QCF_20200620T193303
thanks for the report. It seems the problem was introducced in one of the latest updates.It still worked in 7.0.0. https://senbox.atlassian.net/browse/SIIITBX-338
As short term solution you could do a clean installation of SNAP/S3TBX and do not install updates afterwords.