Problem with snap installation: "Failed to set up mount unit: Invalid argument"

Mount snap "poedit" (unset)                                                   o 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Reloading.
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Started ACPI event daemon.
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Reloading.
Mount snap "poedit" (unset)                                                   o 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Started ACPI event daemon.
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 systemd[1]: Mounted Mount unit for poedit.
 5月 29 17:46:05 Lin-Buo-Ren-SSD480 snapd[18769]: 2018/05/29 17:46:05.625195 handlers.go:477: expected snap "poedit" revision x3 to be mounted but is not
Mount snap "poedit" (unset)                                                   O^C 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Reloading.
 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Started ACPI event daemon.
 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Reloading.
 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Failed to set up mount unit: Invalid argument
 5月 29 17:46:15 Lin-Buo-Ren-SSD480 systemd[1]: Started ACPI event daemon.
error: cannot perform the following tasks:
- Mount snap "poedit" (unset) (cannot proceed, expected snap "poedit" revision x3 to be mounted but is not)

and finally:

handlers.go:372: Reported install problem for "poedit" as 22cc7ce0-6325-11e8-b528-fa163e54c21f OOPSID