插件安装报错

### Describe the bug

进入插件市场，点击安装 swagger 插件报错

C:\Program Files (x86)\postcat>
Websocket Server is running at port 13928 ...
appVersion 0.5.1 null
Websocket Server is running at port 13929 ...
09:59:40.151 > Checking for update
mock service is started: http://127.0.0.1:3040
09:59:42.178 > Update for version 0.5.1 is not available (latest version: 0.5.1, downgrade is disallowed).
09:59:42.179 > checkForUpdatesAndNotify called, downloadPromise is null
[35468:0605/095949.185:ERROR:ssl_client_socket_impl.cc(982)] handshake failed; returned -1, SSL error code 1, net_error -100
Error occurred in handler for 'eo-sync': TypeError: Cannot convert undefined or null to object
at Function.assign ()
at C:\Program Files (x86)\postcat\resources\app.asar\out\app\electron-main\main.js:228:23
at Generator.next ()
at fulfilled (C:\Program Files (x86)\postcat\resources\app.asar\out\app\electron-main\main.js:28:58)
at process.processTicksAndRejections (node:internal/process/task_queues:96:5)
Error occurred in handler for 'eo-sync': TypeError: Cannot convert undefined or null to object
at Function.assign ()
at C:\Program Files (x86)\postcat\resources\app.asar\out\app\electron-main\main.js:228:23
at Generator.next ()
at fulfilled (C:\Program Files (x86)\postcat\resources\app.asar\out\app\electron-main\main.js:28:58)
at process.processTicksAndRejections (node:internal/process/task_queues:96:5)

### Environment

- Postcat version V0.5.1
- OS：Windows 11 23H2 22631.3527