Bug: 'square power of two ' warning during calibration

[dekuenstle]

During calibration, the following warning is printed:

/home/USER/anaconda3/envs/psychopy-pixx/lib/python3.8/site-packages/psychopy/visual/basevisual.py:942: FutureWarning: elementwise comparison failed; returning scalar instead, but in the future will perform elementwise comparison
    if tex in ["none", "None", "color"]:
    Showing gradient with 16-bit luminance (should be smooth) ...
    9.3984  ERROR   Requiring a square power of two (e.g. 16 x 16, 256 x 256) texture but didn't receive one
    9.4024  ERROR   Requiring a square power of two (e.g. 16 x 16, 256 x 256) texture but didn't receive one
    19.4857         ERROR   Requiring a square power of two (e.g. 16 x 16, 256 x 256) texture but didn't receive one
    19.4873         ERROR   Requiring a square power of two (e.g. 16 x 16, 256 x 256) texture but didn't receive one