I have the WP Coppermine plugin working successfully on my live site but wanted it on my local development site. Installed it and set options OK but every time I tried to move the widget to my sidebar it just failed and repeatedly displayed “Select Images…..”
Being a persistant professional programmer I examined the code and found unclosed <label> tags in both the <select> dropdown boxes ( in wp_cpg_widget_generateAlbumSelect function and in wp_cpg_widget_control function).
Once I’d fixed these and a <p> tag that was closed with another <p> instead of </p>, the widget functioned properly.