[SOLVED]Could not open the TWAIN source. Make sure there is a valid source for your scanner in the TWAIN directory found in the windows directory.Adobe Photoshop Error July 13, 2020July 13, 2020 by Vission Computers ADOBE PHOTOSHOP ERROR How to solve the error Open control panel. Select the "Devices and Printers " Select the particular error scanner. Right-click and select “ remove device “ that scanner. Restart the system. Reinstall the scanner driver and software. Restart the system.