runBackup() - Failed to save backup archive

GOGS Version: 0.12.1
database: MariaDB 10.3.23
Debian 10
Apache/2.4.38

I try to do a backup without repos
$> ./gogs backup --exclude-repos

I’ve got error messages I can’t decypher… and logs dont help neither…
And I’ve got a fatal error at the end with a void zip

What can I do to better understand what is going on?
Thanks for any help…

2020/10/12 20:22:40 [ INFO] Backup root directory: /tmp/gogs-backup-242448512
2020/10/12 20:22:40 [ INFO] Packing backup files to: gogs-backup-20201012202240.zip
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [35]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|age.json\n|..., bigger context ...|e-animation-v0.1.0/vendor/bootstrap/package.json\n|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [36]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|son\n\u003|..., bigger context ...|tion-v0.1.0/vendor/font-awesome/.bower.json\n\u003|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [156]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|\u003cbr\u|..., bigger context ...|risjs/spec/specs.html            |   0\n\u003cbr\u|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [165]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|arse_time_|..., bigger context ...|\n\u003cbr\u003e .../morrisjs/spec/lib/parse_time_|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [167]: db.HookResponse.Body: readEscapedChar: invalid escape char after \, error found in #10 byte of ...||   499 +\|..., bigger context ...|s/lib/morris.grid.coffee                |   499 +\|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [169]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|../pages/p|..., bigger context ...|lInit.json       |   0\n\u003cbr\u003e .../pages/p|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [178]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|u003cbr\u0|..., bigger context ...|sb-admin-2/pages/morris.html    |   0\n\u003cbr\u0|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [181]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|\u003e ...|..., bigger context ...|-2/less/sb-admin-2.less  |   0\n\u003cbr\u003e ...|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [187]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|sor - defa|..., bigger context ...|t * - data-fittextSize: ~fittext compressor - defa|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [188]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...| - default|..., bigger context ...| - data-fittextSize: ~fittext compressor - default|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [189]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...| - default|..., bigger context ...| - data-fittextSize: ~fittext compressor - default|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [268]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|ages/panel|..., bigger context ...|             |   0\n\u003cbr\u003e .../pages/panel|...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [274]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|ons.php   |..., bigger context ...|\u003cbr\u003e .../pages/phpAPI/callActions.php   |...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [329]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|03e 1\n   |..., bigger context ...|=\u003e 1\n            [new_plugin] =\u003e 1\n   |...
2020/10/12 20:22:40 [ERROR] [...s.io/gogs/internal/db/webhook.go:489 AfterSet()] Unmarshal [330]: db.HookResponse.Body: readStringSlowPath: unexpected end of input, error found in #10 byte of ...|iew] =\u00|..., bigger context ...|\u003e 1\n            [policy_template_view] =\u00|...
2020/10/12 20:22:40 [FATAL] [...s.io/gogs/internal/cmd/backup.go:159 runBackup()] Failed to save backup archive 'gogs-backup-20201012202240.zip': open /tmp/cae/gogs-backup-20201012202240.zip/gogs-backup/metadata.ini: no such file or directory