LC-MS Spectra Processing ERROR:trying to get slot "params" from an object (class "bplist_error") that is not an S4 object

I am trying to process my raw LC-MS/MS data using the LC-MS Spectra Processing module and keep on getting the same error at Step 4/6 (ERROR:trying to get slot “params” from an object (class “bplist_error”) that is not an S4 object).

Data:
UPLC-Q/TOF negative ion mode raw data
66 mzML files (including BLANK and QC files) uploaded as individual zip files

Parameters:
“Default/manual” parameter settings for “UPLC-Q/TOF” LC-MS Platform
Peak Alignment Method: obiwarp
Peak Annotation Polarity: negative

Please advise on what parameters need to be adjusted to resolve this issue. Thank you very much!