Scrapy ERROR: Boot Error - Failed to open CONNECT tunnel

I wrote a spider to crawl https://tecnoblog.net/categoria/review/ , but when I allow spider crawling, there is one error:

2015-05-19 15:13:20+0100 [scrapy] INFO: Scrapy 0.24.5 started (bot: reviews)
2015-05-19 15:13:20+0100 [scrapy] INFO: Optional features available: ssl, http11
2015-05-19 15:13:20+0100 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'reviews.spiders', 'SPIDER_MODULES': ['reviews.spiders'], 'DOWNLOAD_DELAY': 0.25, 'BOT_NAME': 'reviews'}
2015-05-19 15:13:20+0100 [scrapy] INFO: Enabled extensions: LogStats, TelnetConsole, CloseSpider, WebService, CoreStats, SpiderState
2015-05-19 15:13:20+0100 [scrapy] INFO: Enabled downloader middlewares: ProxyMiddleware, HttpAuthMiddleware, DownloadTimeoutMiddleware, RotateUserAgentMiddleware, RetryMiddleware, DefaultHeadersMiddleware, MetaRefreshMiddleware, RedirectMiddleware, CookiesMiddleware, ChunkedTransferMiddleware, DownloaderStats
2015-05-19 15:13:20+0100 [scrapy] INFO: Enabled spider middlewares: HttpErrorMiddleware, OffsiteMiddleware, RefererMiddleware, UrlLengthMiddleware, DepthMiddleware
2015-05-19 15:13:20+0100 [scrapy] INFO: Enabled item pipelines: 
2015-05-19 15:13:20+0100 [tecnoblog] INFO: Spider opened
2015-05-19 15:13:20+0100 [tecnoblog] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
2015-05-19 15:13:20+0100 [scrapy] DEBUG: Telnet console listening on 127.0.0.1:6030
2015-05-19 15:13:20+0100 [scrapy] DEBUG: Web service listening on 127.0.0.1:6087
2015-05-19 15:13:25+0100 [tecnoblog] DEBUG: Redirecting (301) to <GET https://tecnoblog.net/categoria/review/> from <GET http://tecnoblog.net/categoria/review/>
2015-05-19 15:13:26+0100 [tecnoblog] ERROR: Error downloading <GET https://tecnoblog.net/categoria/review/>: Could not open CONNECT tunnel.
2015-05-19 15:13:26+0100 [tecnoblog] INFO: Closing spider (finished)
2015-05-19 15:13:26+0100 [tecnoblog] INFO: Dumping Scrapy stats:
    {'downloader/exception_count': 1,
     'downloader/exception_type_count/scrapy.core.downloader.handlers.http11.TunnelError': 1,
     'downloader/request_bytes': 644,
     'downloader/request_count': 2,
     'downloader/request_method_count/GET': 2,
     'downloader/response_bytes': 501,
     'downloader/response_count': 1,
     'downloader/response_status_count/301': 1,
     'finish_reason': 'finished',
     'finish_time': datetime.datetime(2015, 5, 19, 14, 13, 26, 227904),
     'log_count/DEBUG': 3,
     'log_count/ERROR': 1,
     'log_count/INFO': 7,
     'scheduler/dequeued': 2,
     'scheduler/dequeued/memory': 2,
     'scheduler/enqueued': 2,
     'scheduler/enqueued/memory': 2,
     'start_time': datetime.datetime(2015, 5, 19, 14, 13, 20, 217735)}
2015-05-19 15:13:26+0100 [tecnoblog] INFO: Spider closed (finished)

      

        
        
        
      

    

Any ideas why this is happening? 2015-05-19 15: 13: 26 + 0100 [tecnoblog] ERROR: Error loading https://tecnoblog.net/categoria/review/ ">: Unable to open CONNECT tunnel. This site which I crawled last month ... How to fix this? I tried to change the start url to "http" instead of "https", but it redirects it: S