SSR + mobileDetect plugin = failed

[wokalek-work]

If I put ssr: false in nuxt config, it's generate fine.

If I do not place ssr: false, it's failed.

Seems like problem in this line: userAgent = this.ctx.req.headers["user-agent"].

What should I do?
I run npm run build, then npm run generate.

Error output

 + 26 hidden assets
Entrypoint app = server.js server.js.map

 WARN  [pwa] [icon] Icon not found in C:\Work\mosoblcom\nuxt\static\icon.png     

i Full static generation activated                                     12:11:09
i Generating output directory: nuxt/                                   12:11:09
i Generating pages with full static mode                               12:11:09

 ERROR   /company                                                      12:11:09  

TypeError: Cannot read properties of undefined (reading 'headers')
    at new MobileDetect (node_modules/.cache/nuxt/nuxt-mobile-detect/mobileDetect.js:11:0)
    at nuxt_mobile_detect_plugin (node_modules/.cache/nuxt/nuxt-mobile-detect/plugin.js:4:0)
    at createApp (node_modules/.cache/nuxt/index.js:230:0)
    at async module.exports.__webpack_exports__.default (node_modules/.cache/nuxt/server.js:85:0)


 ERROR   /contacts                                                     12:11:09  

TypeError: Cannot read properties of undefined (reading 'headers')
    at new MobileDetect (node_modules/.cache/nuxt/nuxt-mobile-detect/mobileDetect.js:11:0)
    at nuxt_mobile_detect_plugin (node_modules/.cache/nuxt/nuxt-mobile-detect/plugin.js:4:0)
    at createApp (node_modules/.cache/nuxt/index.js:230:0)
    at runNextTicks (node:internal/process/task_queues:61:5)
    at listOnTimeout (node:internal/timers:528:9)
    at processTimers (node:internal/timers:502:7)
    at async module.exports.__webpack_exports__.default (node_modules/.cache/nuxt/server.js:85:0)


 ERROR   /portfolio                                                    12:11:09  

TypeError: Cannot read properties of undefined (reading 'headers')
    at new MobileDetect (node_modules/.cache/nuxt/nuxt-mobile-detect/mobileDetect.js:11:0)
    at nuxt_mobile_detect_plugin (node_modules/.cache/nuxt/nuxt-mobile-detect/plugin.js:4:0)
    at createApp (node_modules/.cache/nuxt/index.js:230:0)
    at runNextTicks (node:internal/process/task_queues:61:5)
    at listOnTimeout (node:internal/timers:528:9)
    at processTimers (node:internal/timers:502:7)
    at async module.exports.__webpack_exports__.default (node_modules/.cache/nuxt/server.js:85:0)


 ERROR   /                                                             12:11:09  

TypeError: Cannot read properties of undefined (reading 'headers')
    at new MobileDetect (node_modules/.cache/nuxt/nuxt-mobile-detect/mobileDetect.js:11:0)
    at nuxt_mobile_detect_plugin (node_modules/.cache/nuxt/nuxt-mobile-detect/plugin.js:4:0)
    at createApp (node_modules/.cache/nuxt/index.js:230:0)
    at runNextTicks (node:internal/process/task_queues:61:5)
    at processTimers (node:internal/timers:499:9)
    at async module.exports.__webpack_exports__.default (node_modules/.cache/nuxt/server.js:85:0)

√ Client-side fallback created: 200.html                               12:11:09  
√ Static manifest generated                                            12:11: