In order for mochawesome-report-generator to work properly, make sure html=false in your report config in cypress.json. when you use mochawesome, so that only the raw json file is generated.

"screenshotOnRunFailure": true,

"screenshotsFolder": "cypress/reports/mochawesome-html-report/assets",

"reporter": "mochawesome",

"reporterOptions": {

"reportDir": "cypress/reports/mochawesome-report",

"quite": true,

"overwrite": false,

"html": false,

"json": true,

"timestamp": "mmddyyyy_HHMMss"

}