Hello. With this test payload
{"config":{"chart":{"height":350,"type":"heatmap"},"plotOptions":{"heatmap":{"useFillColorAsStroke":true}},"xaxis":{"labels":{"hideOverlappingLabels":true},"group":{"style":{"fontSize":"10px","fontWeight":700},"groups":[{"title":"Jan","cols":30},{"title":"Feb","cols":30},{"title":"Mar","cols":30},{"title":"Apr","cols":30}]}},"series":[{"name":"5","data":[{"x":"1","y":0},{"x":"2","y":0},{"x":"3","y":0},{"x":"4","y":0},{"x":"5","y":0},{"x":"6","y":0},{"x":"7","y":0},{"x":"8","y":0},{"x":"9","y":0},{"x":"10","y":0},{"x":"11","y":0},{"x":"12","y":0},{"x":"13","y":0},{"x":"14","y":0},{"x":"15","y":0},{"x":"16","y":0},{"x":"17","y":0},{"x":"18","y":0},{"x":"19","y":0},{"x":"20","y":0},{"x":"21","y":0},{"x":"22","y":0},{"x":"23","y":0},{"x":"24","y":0},{"x":"25","y":0},{"x":"26","y":0},{"x":"27","y":0},{"x":"28","y":0},{"x":"29","y":0},{"x":"30","y":0},{"x":"31","y":0},{"x":"32","y":0},{"x":"33","y":0},{"x":"34","y":0},{"x":"35","y":0},{"x":"36","y":0},{"x":"37","y":0},{"x":"38","y":0},{"x":"39","y":0},{"x":"40","y":0},{"x":"41","y":0},{"x":"42","y":0},{"x":"43","y":0},{"x":"44","y":0},{"x":"45","y":0},{"x":"46","y":0},{"x":"47","y":0},{"x":"48","y":0},{"x":"49","y":0},{"x":"50","y":0},{"x":"51","y":0},{"x":"52","y":0},{"x":"53","y":0},{"x":"54","y":0},{"x":"55","y":0},{"x":"56","y":0},{"x":"57","y":0},{"x":"58","y":0},{"x":"59","y":0},{"x":"60","y":0},{"x":"61","y":0},{"x":"62","y":0},{"x":"63","y":0},{"x":"64","y":0},{"x":"65","y":0},{"x":"66","y":0},{"x":"67","y":0},{"x":"68","y":0},{"x":"69","y":0},{"x":"70","y":0},{"x":"71","y":0},{"x":"72","y":0},{"x":"73","y":0},{"x":"74","y":0},{"x":"75","y":0},{"x":"76","y":0},{"x":"77","y":0},{"x":"78","y":0},{"x":"79","y":0},{"x":"80","y":0},{"x":"81","y":0},{"x":"82","y":0},{"x":"83","y":0},{"x":"84","y":0},{"x":"85","y":0},{"x":"86","y":0},{"x":"87","y":0},{"x":"88","y":0},{"x":"89","y":0},{"x":"90","y":0},{"x":"91","y":0},{"x":"92","y":0},{"x":"93","y":0},{"x":"94","y":0},{"x":"95","y":0},{"x":"96","y":0},{"x":"97","y":0},{"x":"98","y":0},{"x":"99","y":0},{"x":"100","y":0},{"x":"101","y":0},{"x":"102","y":0},{"x":"103","y":0},{"x":"104","y":0},{"x":"105","y":0},{"x":"106","y":0},{"x":"107","y":0},{"x":"108","y":0},{"x":"109","y":0},{"x":"110","y":0},{"x":"111","y":0},{"x":"112","y":0},{"x":"113","y":0},{"x":"114","y":0},{"x":"115","y":0},{"x":"116","y":0},{"x":"117","y":0},{"x":"118","y":0},{"x":"119","y":0},{"x":"120","y":0},{"x":"121","y":0},{"x":"122","y":0},{"x":"123","y":0},{"x":"124","y":0},{"x":"125","y":0},{"x":"126","y":0},{"x":"127","y":0},{"x":"128","y":0},{"x":"129","y":0},{"x":"130","y":0},{"x":"131","y":0},{"x":"132","y":0},{"x":"133","y":0},{"x":"134","y":0},{"x":"135","y":0},{"x":"136","y":0},{"x":"137","y":0},{"x":"138","y":0},{"x":"139","y":0},{"x":"140","y":0},{"x":"141","y":0},{"x":"142","y":0},{"x":"143","y":0},{"x":"144","y":0},{"x":"145","y":0},{"x":"146","y":0},{"x":"147","y":0},{"x":"148","y":0},{"x":"149","y":0},{"x":"150","y":0},{"x":"151","y":0},{"x":"152","y":0},{"x":"153","y":0},{"x":"154","y":0},{"x":"155","y":0},{"x":"156","y":0},{"x":"157","y":0},{"x":"158","y":0},{"x":"159","y":0},{"x":"160","y":0},{"x":"161","y":0},{"x":"162","y":0},{"x":"163","y":0},{"x":"164","y":0},{"x":"165","y":0},{"x":"166","y":0},{"x":"167","y":0},{"x":"168","y":0},{"x":"169","y":0},{"x":"170","y":0},{"x":"171","y":0},{"x":"172","y":0},{"x":"173","y":0},{"x":"174","y":0},{"x":"175","y":0},{"x":"176","y":0},{"x":"177","y":0},{"x":"178","y":0},{"x":"179","y":0},{"x":"180","y":0},{"x":"181","y":0},{"x":"182","y":0},{"x":"183","y":0},{"x":"184","y":0},{"x":"185","y":0},{"x":"186","y":0},{"x":"187","y":0},{"x":"188","y":0},{"x":"189","y":0},{"x":"190","y":0},{"x":"191","y":0},{"x":"192","y":0},{"x":"193","y":0},{"x":"194","y":0},{"x":"195","y":0},{"x":"196","y":0},{"x":"197","y":0},{"x":"198","y":0},{"x":"199","y":0},{"x":"200","y":0},{"x":"201","y":0},{"x":"202","y":0},{"x":"203","y":0},{"x":"204","y":0},{"x":"205","y":0},{"x":"206","y":0},{"x":"207","y":0},{"x":"208","y":0},{"x":"209","y":0},{"x":"210","y":0},{"x":"211","y":0},{"x":"212","y":0},{"x":"213","y":0},{"x":"214","y":0},{"x":"215","y":0},{"x":"216","y":0},{"x":"217","y":0},{"x":"218","y":0},{"x":"219","y":0},{"x":"220","y":0},{"x":"221","y":0},{"x":"222","y":0},{"x":"223","y":0},{"x":"224","y":0},{"x":"225","y":0},{"x":"226","y":0},{"x":"227","y":0},{"x":"228","y":0},{"x":"229","y":0},{"x":"230","y":0},{"x":"231","y":0},{"x":"232","y":0},{"x":"233","y":0},{"x":"234","y":0},{"x":"235","y":0},{"x":"236","y":0},{"x":"237","y":0},{"x":"238","y":0},{"x":"239","y":0},{"x":"240","y":0},{"x":"241","y":0},{"x":"242","y":0},{"x":"243","y":0},{"x":"244","y":0},{"x":"245","y":0},{"x":"246","y":0},{"x":"247","y":0},{"x":"248","y":0},{"x":"249","y":0},{"x":"250","y":0},{"x":"251","y":0},{"x":"252","y":0},{"x":"253","y":0},{"x":"254","y":0},{"x":"255","y":0},{"x":"256","y":0},{"x":"257","y":0},{"x":"258","y":0},{"x":"259","y":0},{"x":"260","y":0},{"x":"261","y":0},{"x":"262","y":0},{"x":"263","y":0},{"x":"264","y":0},{"x":"265","y":0},{"x":"266","y":0}]}]}}
I randomly get a 500 Internal Server Error using the POST https://quickchart.io/apex-charts/render endpoint. Any idea what may cause the problem? What are the limitations of datapoints creating a heatmap? Is it possible to hide the default labels on the x-axis and only show the group labels? Thanks in advance.