The ability to zoom in / out of a photo from Google Maps is in the lower left corner.
This problem may also result from the web browser you are using - we suggest you try using a different one. The proper operation of the application may also block cookies saved by the browser. The link contains information on how to delete cookies: https://www.pcmag.com/how-to/how-to-control-and-delete-cookies-on-your-browser