Willem-Jan, find the site packages in RPI4 with python3 -m site check if indiweb is in change to indiweb dir open main.py there change line BaseRequest.MEMFILE_MAX = 100 * 1024 * 1024 to BaseRequest.MEMFILE_MAX = 1000 * 1024 * 1024 manually and restart indiweb. Hop this helps. MichelRead More...