Updated error page template
Updated error page template

I removed some unused imports and changed "font-family: sans" to "font-family: sans-serif", which I assume it was meant to be.
defnull/bottle,bottlepy/bottle,CentricWebEstate/bottle,kevinmel2000/bottle,bottlepy/bottle,wangjun/bottle,gaotongfei/bottle,hkmshb/bottle,oz123/bottle,AWFU/bottle,fkazimierczak/bottle,Inndy/bottle,kevinmel2000/bottle,gaotongfei/bottle,ifduyue/bottle,SamuelMarks/bottle,mrdon/bottle,StdioA/bottle,enzzc/bottle,samstav/bottle,catroot/bottle,prologic/bottle,myzhan/bottle,prologic/bottle,CentricWebEstate/bottle,samstav/bottle,ericfrederich/bottle,khirayama/bottle,oz123/bottle,catroot/bottle,Kjuly/bottle,SmithSamuelM/bottle,ifduyue/bottle,Kjuly/bottle,khirayama/bottle,enzzc/bottle,fkazimierczak/bottle,defnull/bottle,kevintaw/bottle,myzhan/bottle,taisa007/bottle-ja,mefyl/bottle,taisa007/bottle-ja,hayate/bottle,kevintaw/bottle,ericfrederich/bottle,SmithSamuelM/bottle,hayate/bottle,hkmshb/bottle,SamuelMarks/bottle,mrdon/bottle,Inndy/bottle,mefyl/bottle,wangjun/bottle,AWFU/bottle,StdioA/bottle