Classification Workflow problems with Raster / Classification Mode

Classification Workflow wont accept raster classification as sample

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Error: 'ClassificationWorkflowApp' object has no attribute 'colors'

Stack trace:

An error has occurred while executing Python code: 

TypeError: can't multiply sequence by non-int of type 'float' 
Traceback (most recent call last):
  File "/root/.local/share/QGIS/QGIS3/profiles/default/python/plugins/enmapboxplugin/enmapbox/coreapps/enmapboxapplications/classificationapp/core.py", line 145, in initClasses
    saveLayerAsClassification(
  File "/root/.local/share/QGIS/QGIS3/profiles/default/python/plugins/enmapboxplugin/hubdsm/processing/savelayerasclassification.py", line 141, in saveLayerAsClassification
    classification.setCategories(categories=categories)
  File "/root/.local/share/QGIS/QGIS3/profiles/default/python/plugins/enmapboxplugin/hubdsm/core/gdalband.py", line 231, in setCategories
    names = ['n/a'] * (maxId + 1)
TypeError: can't multiply sequence by non-int of type 'float'


Python version: 3.8.5 (default, Jul 28 2020, 12:59:40) [GCC 9.3.0] 
QGIS version: 3.16.3-Hannover Hannover, exported

How to reproduce:

Use Algo Testdata → Create Test Classification
Use Classification Workflow in Raster/Classification Mode with enmap_berlin.bsq and the created classification from Create Test Classification
Run

Version 3.7.20210125T112758.master (running on docker: qgis/qgis release-3_16, based on Ubuntu 20.04.1 LTS)

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