I note that Toccata Classics have brought out two volumes of Erb's organ music; their latest advertising includes a link to his stupefyingly lengthy catalogue of works:
https://sites.google.com/site/mariejosepherb/biographie/liste-des-oeuvres?authuser=0&goal=0_1d4d20a99c-9c6b567a74-329615321&mc_cid=9c6b567a74&mc_eid=2ffe1271b8
Excerpts from both discs can be found on the organist's YT site.
https://www.youtube.com/channel/UCOa4xRky1pbErckYd1dFp6Q
Somewhat to my surprise, I found his Sonatines for Organ & Cor Anglais quite charming.