Artem Russakovskii pointed me to an error which may occur in file names and folder names. When a file name contains apostrophes, or other characters not supported in an url, they were not correctly decoded, resulting in a Lazyest Gallery error. If you run into this error, or if you are planning to use file names with apostrophes, please update the Lazyest Gallery plugin to version 0.15.5. About a year ago, apostrophes in captions made Lazyest Gallery crash because of errors reading the xml files. Although I corrected that, I didn’t envision tat anyone would consider using apostrophes in file names or folder names.
Please mind, if you create new folders in the Lazyest Gallery file manager, you cannot use apostrophes.
I have added a button on the Lazyest Gallery settings page to generate missing tumbs and slides. This will speed up loading the gallery page for your visitors.